Classifications

• • H—ELECTRICITY
  • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
  • H02P29/00—Arrangements for regulating or controlling electric motors, appropriate for both AC and DC motors
  • H02P29/40—Regulating or controlling the amount of current drawn or delivered by the motor for controlling the mechanical load
• • H—ELECTRICITY
  • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
  • H02P29/00—Arrangements for regulating or controlling electric motors, appropriate for both AC and DC motors
• • H—ELECTRICITY
  • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
  • H02P29/00—Arrangements for regulating or controlling electric motors, appropriate for both AC and DC motors
  • H02P29/10—Arrangements for regulating or controlling electric motors, appropriate for both AC and DC motors for preventing overspeed or under speed

Definitions

• the invention relates to an electric motor assembly, in particular for driving a fan for engine cooling and / or an air conditioning system of a motor vehicle, with an electric motor and with a motor control device for controlling the electric motor.
• the invention further comprises a method for operating an electric motor and a motor control device.
• Electric motor assemblies of the type mentioned are known. They are often used for driving a fan of a motor vehicle, this being associated with, for example, the engine cooling and / or the air conditioning.
• a motor control device in particular a clock regulator, is used to control the electric motor.
• the timing controller is controlled, for example, according to specification of a control or control device of an internal combustion engine so that the electric motor of the fan is operated in a specific clock ratio. This can be done almost any control of the electric motor in its entire power range.
• Electric motors are subject to tolerances that are problematic in a design of a device, such as engine cooling or air conditioning, as they are difficult to take into account.
• the tolerances can relate, for example, to a power consumption, a power output and / or an efficiency of the motors. If these tolerances are to be restricted, for example by a high-precision production and / or sorting out of motors, which are outside of a tolerance range, comparatively high costs arise. Therefore, for cost reasons, usually a relatively large tolerance with respect to the electrical power consumption, the power output and / or the efficiency of the electric motors accepted. This must be included R. 323817 2
• the electric motor assembly with the features mentioned in claim 1 has the advantage that despite the existing, relatively large tolerance in the electric motors oversizing of the
• Electric motor is avoided in the design of the device. Thus, lower cost components can be used.
• This is inventively achieved by the engine control device according to a characteristic of the electric motor and / or the fan adjustable and the electric motor is so adaptable in its power and / or speed.
• the characteristic curve of the electric motor is determined, for example, after the manufacture of the electric motor and / or before its installation. According to the characteristic curve, the engine control device is adjusted to achieve an adaptation of the power and / or rotational speed of the electric motor.
• the tolerance range described above extends from the lowest power output and / or speed electric motor to the highest power output and / or speed motor for which the most severe wear effects occur. It is therefore advantageous to adapt the power and / or rotational speed of the electric motor with the largest power output in such a way that the requirements for the power output and / or rotational speed are fulfilled, but the wear effects R. 323817 3
• an electric motor is therefore preferably used which can provide the required air output or the required output even at the lowest permissible power output and / or speed, whereas electric motors which have a greater power output and / or rotational speed are based on the motor control device the characteristic of the electric motor adapted in their performance and / or speed, in particular limited.
• a shortened life of electric motors, which can deliver a higher power and / or have a higher speed, need only be considered to a small extent, since the electric motors are limited to a lower power and / or speed.
• the life of the device can be increased or a simpler and therefore cheaper electric motor can be installed.
• the electric motor is used in a fan, the amount of air delivered is substantially dependent on the speed of the electric motor. A higher speed than a required thus entails an unnecessarily high flow rate and reduces the life of the electric motor.
• the limitation of the speed is preferably carried out. It is also possible to use a characteristic curve of the fan and not of the electric motor for adjusting the power and / or the rotational speed. In this case, tolerances of the device, so in particular of the fan, can be considered.
• the characteristic curve describe the conveyed air volume over the speed and the power or the speed of the fan can be set to a required flow rate.
• the adjustment of the power and / or speed in this context are to be understood as an adaptation of the maximum power and / or the maximum speed of the electric motor. So it is a limitation of the maximum power and / or the maximum speed provided.
• a further development of the invention provides that the characteristic curve after production and / or installation of the electric motor, in particular with a band end test, is determined.
• the characteristic is determined on R. 323817 4
• the motor control device is a clock regulator or has a clock regulator.
• the clock regulator consists for example of an interface to a motor control unit, an electronic unit with a computer and transistors for clocked control of the electric motor.
• the clock controller By means of the clock controller, a uniform motor power of the electric motors is to be realized. This is done by adjusting the on / off ratio of the transistors to the tolerance position of the electric motor or to the characteristic, so that the oversizing of the electric motor is avoided.
• the motor control device may be a clock controller.
• the motor control device includes a clock controller.
• the characteristic is a power characteristic and / or speed characteristic.
• an assessment of the tolerance position of the electric motor can be based on an arbitrary characteristic curve.
• a power characteristic and / or a speed characteristic is / are used.
• the power of the electric motor or a torque over another value, such as a speed held.
• a development of the invention provides that the setting of the engine control device, in particular once, takes place before a regular operation of the electric motor.
• the electric motor is thus adjusted before a regular operation, that is, an operation for testing and / or test purposes can also be done without setting the engine control device.
• the setting of the engine control device, in particular directly, is carried out before or after installation in the device to be designed. Especially R. 323817 5
• a development of the invention provides that the engine control device is set so that the characteristic or the power and / or speed with at least one characteristic or at least one power and / or speed of other, identical electric motors substantially matches.
• the characteristic curve or the power and / or speed of the electric motor by means of the motor control device on the characteristic or the power and / or speed of other, identical electric motors, so for example electric motors from a same production series, tuned. In this way, a plurality of electric motors can be installed, whose power and / or speed extends over a wide tolerance range, and despite all a substantially equal performance and / or speed of the electric motors be guaranteed.
• a development of the invention provides that the power and / or rotational speed are determined by means of a, in particular on the basis of the characteristic,
• Proportionality factor is definable. In order not to have to keep the complete characteristic in the engine control device, it is provided that only a proportionality factor is fixed. For example, a percentage of the maximum power of the electric motor can be specified, with which the desired power output is achieved. If a clock regulator is used, the proportionality factor can for example specify the on-duration of transistors. It can be provided, for example, that at maximum power requirement, a motor having the lowest power output and / or speed is driven with 100% duty cycle of the transistors, while the electric motor with the largest power output R. 323817 6
• the proportionality factor is determined from the characteristic curve. This means that the characteristic of the motor is determined and then derived from the characteristic of the proportionality factor.
• a development of the invention provides that the electric motor is provided with a marking, via which the characteristic curve and / or the proportionality factor can be assigned to it. It is thus provided that the specific characteristic and / or the specific proportionality factor is assigned to the electric motor in such a way that it can easily be read out.
• the electric motor is provided with a mark.
• the characteristic curve and / or the proportionality factor can be coded in the marking, or else the marking can represent an identification by means of which the characteristic curve and / or the proportionality factor can be assigned.
• the mark is for example one
• Serial number wherein the characteristic and / or the proportionality factor in a central register, for example a database, is / are linked to this serial number.
• the first-mentioned possibility is used, namely that the characteristic curve and / or the proportionality factor is / are directly contained in the marking.
• the marking is a bar code.
• the bar code can be easily attached to the electric motor. It is thus easily possible to assign to it a unique identifier and / or a data record in which the characteristic curve and / or the proportionality factor and / or the serial number are coded.
• a development of the invention provides that the electric motor has a greater than a required power and / or speed and is adapted by means of the engine control device to the required power and / or speed.
• a production series of electric motors can be selected so that all electric motors meet the requirements for a minimum power output and / or speed. In this case, due to the tolerance of the power and / or speed, the output power and / or speed of a number of electric motors is too large. It is intended here R. 323817 7
• the invention further relates to a method for operating an electric motor, in particular according to the preceding embodiments, wherein the power and / or speed of the electric motor by means of a motor control device, in particular a clock regulator, is adaptable, comprising the steps of: determining a characteristic of the electric motor and / or a By means of the electric motor drivable device after the production, assigning the characteristic and / or one, in particular determined from the characteristic, proportionality factor to the electric motor by a mark of the electric motor, adjusting the motor control device according to / by the marking associated with the electric motor characteristic and / or Proportionality factor, and operating the electric motor with adapted by means of the engine control unit performance and / or speed.
• a motor control device in particular a clock regulator
• the invention further relates to a motor control device, in particular clock regulator, for controlling an electric motor, in particular according to the above statements and / or for implementing the method described above. It is provided that the motor control device according to a characteristic of the electric motor and / or driven by means of the electric motor device adjustable and the electric motor is adaptable in its power and / or speed.
• the engine control device may in particular be associated with the electric motor assembly described above.
• Figure 1 is a diagram in which a speed is plotted against a torque, wherein a characteristic of a device to be interpreted as well as characteristics of electric motors of an electric motor assembly are shown with a tolerance range, and
• FIG. 2 shows the diagram of Figure 1, wherein the tolerance range is reduced by shifting a characteristic of the electric motor.
• FIG. 1 shows a diagram in which a rotational speed n of the unit (1 / min) is plotted against a torque M of the unit [Nm]. Shown is a characteristic 1 of a device to be interpreted (not shown). Shown are also characteristic curves 2, 3 and 4 a Serier of electric motors. Characteristic curve 2 describes the curve averaged over the series of the rotational speed n over the torque M. The characteristic curve 3 describes an electric motor which delivers a maximum power output at a set operating point, while the characteristic curve 4 represents the electric motor with the lowest power output.
• the device is designed so that the electric motor with the lowest power output is sufficient.
• the higher speed n or the higher torque M of the operating point 6, that is, the additional power output compared to the operating point 5, excess and actually not required by the device to be interpreted but only leads to the described higher wear and thus a shorter life expectancy of the electric motor. Therefore, usually a higher design of the electric motors must be chosen to meet both the requirements of the least permissible
• the situation described is recorded in the diagram in application area characteristics 7 and 8.
• These application range characteristics 7 and 8 indicate the maximum speed n and the maximum torque M, ie the maximum permissible power, at which a required service life of the electric motor or the electric motors is achieved.
• the application area characteristic curve 7 designates a normal and the application area characteristic 8 a higher-value design of the electric motor. It can be clearly seen that the operating point 5 of the electric motor with the lowest power output is on the left hand side of the operating range characteristic curve 7. So it can be used the normal design of the electric motor, without premature failure is to be feared.
• the operating point 6 of the largest output electric motor is on the right side of the insert area characteristic 7, so that failure of the electric motor seems likely. For this reason, the higher order version of the electric motor with the insert area characteristic 8 must be used.
• FIG. 2 shows the diagram known from FIG. 1, wherein an electric motor assembly according to the invention is used, the electric motor R. 323817 10
• the electric motor assembly includes a motor control device with which the electric motor is driven. By means of the motor control device, a characteristic of the electric motor can be adjusted and the electric motor can be adjusted in its performance.
• the motor controller of the electric motor assembly is used to adjust the power of the electric motor with the largest power output in such a way that a continuous-running operation is possible.
• the characteristic curve 3 is thus shifted in the direction of the arrow 9 so that a new operating point 10, which is located at an intersection of the characteristic curve 1 with the characteristic curve 1 1 created by the adaptation of the power of the electric motor, is positioned on the left hand side of the application region characteristic curve 7.
• the new characteristic 11 runs almost congruent to the characteristic curve 4 of the electric motor with the lowest power output.
• endurance resistance can be achieved using the normal design of the electric motor (range of application characteristic 7). This makes it possible to save both the cost of a higher design of the electric motor and weight and additional space.
• Another advantage of the adaptation of the electric motor assembly is the possible realization of a modular system. While in the current procedure (corresponding to FIG. 1) a separate design of the electric motor takes place for each project and as a result a separate design of the motor control device, it is possible to set the characteristic curve of the motor control device
• Electric motor by means of the motor control device, a modular system for electric motor and engine control device can be used.
• a suitable selection is made from three engine classes.
• a slight oversizing of the electric motor or the electric motor assembly can be accepted, since this can be adjusted by adjusting the engine control device to an optimum operating state.
• both an electric motor and a motor control device can be selected from the modular system. In the final assembly of the R. 323817 1 1
• a conveyed air volume of a fan can be adjusted via an adjustment of the speed.
• This has the advantage that tolerances of the device, not only of the electric motor, can be taken into account.
• specific components for example frame and fan, but also electric motor and motor control device are defined in the design of a device for each project. Electric motor and motor control device form a functionally coordinated unit and must be designed on the development side so that all tolerances are taken into account. This usually requires several iterations and is correspondingly expensive.
• the advantages of the electric motor assembly according to the invention, the method for operating an electric motor and the motor control device are thus the cost-effective design of the electric motors, the possible use of an electric motor assembly or an electric motor and / or a motor control device for different applications, the possible realization of a modular system for engine control device and electric motor , A significant reduction in the variety of electric motors and engine control devices, a reduction in sales and development complexity and the elimination of additional sensors, over which, for example, a performance adjustment can be realized.

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• Engineering & Computer Science (AREA)
• Power Engineering (AREA)
• Control Of Electric Motors In General (AREA)
• Control Of Multiple Motors (AREA)
• Motor Or Generator Cooling System (AREA)
• Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)

Priority Applications (5)

Applications Claiming Priority (2)

Publications (1)

Family

ID=40940545

Family Applications (1)

Country Status (7)

Cited By (1)

Families Citing this family (2)

Citations (5)

Family Cites Families (4)

• 2008
  • 2008-08-19 DE DE102008041325A patent/DE102008041325A1/de not_active Withdrawn
• 2009
  • 2009-06-12 AT AT09779729T patent/ATE549632T1/de active
  • 2009-06-12 US US13/060,018 patent/US8823312B2/en not_active Expired - Fee Related
  • 2009-06-12 CN CN200980132205.2A patent/CN102124359B/zh not_active Expired - Fee Related
  • 2009-06-12 JP JP2011523358A patent/JP5542819B2/ja not_active Expired - Fee Related
  • 2009-06-12 EP EP09779729A patent/EP2316042B1/de not_active Not-in-force
  • 2009-06-12 WO PCT/EP2009/057259 patent/WO2010020444A1/de active Application Filing

Patent Citations (5)

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